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Journal of Optics B Quantum and Semiclassical Optics

Nonlinear dissipation and the quantum noise of light in semiconductor microcavities

Hichem Eleuch, R. Bennaceur

Published Feb 13, 2004• 50 citations
Publisher

Abstract

Our work presents a theoretical study on the behaviour of the noise spectra of the light reflected by a microcavity containing a semiconductor quantum well. In the case of very small nonlinear dissipation, we have obtained significant squeezing, even though we have assumed a small nonlinear excitonic interaction. We show that the nonlinear dissipation destroys the squeezing and decreases the photonic and excitonic densities in the microcavity.

DOI
10.1088/1464-4266/6/4/001

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Our work presents a theoretical study on the behaviour of the noise spectra of the light reflected by a microcavity containing a semiconductor quantum well. In the case of very small nonlinear dissipation, we have obtained significant squeezing, even though we have assumed a small nonlinear excitonic interaction. We show that the nonlinear dissipation destroys the squeezing and decreases the photonic and excitonic densities in the microcavity.
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Abstract The quantum noise and the squeezing effect, in the transmitted light, by a dipolariton system formed by a double quantum wells microcavity in the strong coupling regime are investigated. It is shown that the indirect exciton nonlinearity generates stronger squeezing than the direct exciton nonlinearity, nevertheless produces very high fluctuations for some particular detunings and nonlinearities. The system shows a considerable sensitivity to the thermal excitations where the coupling to the direct and indirect excitonic thermal baths progressively destroys the nonclassical effect. Despite that, indirect exciton squeezing manifests a higher resistance against the thermal bath temperature. As a result, the emission field is strongly governed by the indirect excitons, varying between robust squeezing and excess noise.
We theoretically investigate the squeezing of light by the interaction between a biexciton and cavity polaritons. As a model system, we consider a CuCl-quantum-well microcavity in which a biexciton can stably exist. An effective biexciton-polariton coupled state can be formed by controlling the polariton level structure by modifying the quantum-well thickness. We analyze in detail the nonlinear optical response obtained from the coupled state, and evaluate the light squeezing by directly calculating the variance of quantum noise in the output field, in terms of the dependence of the squeezing on the incident light intensity. We clarify an optimal condition yielding maximum squeezing and show that squeezing is enhanced by utilizing biexciton nonlinearity, compared with the squeezing achieved in a system having no biexciton.